It is standard (see [1]} for a modern reference) that the fractions \(v/n\)  corresponding to solutions to the congruence (REF ) are given by
\( \frac{v}{n} = \frac{r}{\alpha t} - \frac{a_1 t + 2 a_0 u + b t}{2 a t g(t,u)} \text{ if } |t| > |u|,\) 
